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/*
* Copyright 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// TODO(b/129481165): remove the #pragma below and fix conversion issues
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wconversion"
#define ATRACE_TAG ATRACE_TAG_GRAPHICS
#include "VSyncModulator.h"
#include <cutils/properties.h>
#include <utils/Trace.h>
#include <chrono>
#include <cinttypes>
#include <mutex>
namespace android::scheduler {
VSyncModulator::VSyncModulator(IPhaseOffsetControl& phaseOffsetControl,
Scheduler::ConnectionHandle appConnectionHandle,
Scheduler::ConnectionHandle sfConnectionHandle,
const OffsetsConfig& config)
: mPhaseOffsetControl(phaseOffsetControl),
mAppConnectionHandle(appConnectionHandle),
mSfConnectionHandle(sfConnectionHandle),
mOffsetsConfig(config) {
char value[PROPERTY_VALUE_MAX];
property_get("debug.sf.vsync_trace_detailed_info", value, "0");
mTraceDetailedInfo = atoi(value);
}
void VSyncModulator::setPhaseOffsets(const OffsetsConfig& config) {
std::lock_guard<std::mutex> lock(mMutex);
mOffsetsConfig = config;
updateOffsetsLocked();
}
void VSyncModulator::setTransactionStart(Scheduler::TransactionStart transactionStart) {
switch (transactionStart) {
case Scheduler::TransactionStart::EarlyStart:
ALOGW_IF(mExplicitEarlyWakeup, "Already in TransactionStart::EarlyStart");
mExplicitEarlyWakeup = true;
break;
case Scheduler::TransactionStart::EarlyEnd:
ALOGW_IF(!mExplicitEarlyWakeup, "Not in TransactionStart::EarlyStart");
mExplicitEarlyWakeup = false;
break;
case Scheduler::TransactionStart::Normal:
case Scheduler::TransactionStart::Early:
// Non explicit don't change the explicit early wakeup state
break;
}
if (mTraceDetailedInfo) {
ATRACE_INT("mExplicitEarlyWakeup", mExplicitEarlyWakeup);
}
if (!mExplicitEarlyWakeup &&
(transactionStart == Scheduler::TransactionStart::Early ||
transactionStart == Scheduler::TransactionStart::EarlyEnd)) {
mRemainingEarlyFrameCount = MIN_EARLY_FRAME_COUNT_TRANSACTION;
mEarlyTxnStartTime = std::chrono::steady_clock::now();
}
// An early transaction stays an early transaction.
if (transactionStart == mTransactionStart ||
mTransactionStart == Scheduler::TransactionStart::EarlyEnd) {
return;
}
mTransactionStart = transactionStart;
updateOffsets();
}
void VSyncModulator::onTransactionHandled() {
mTxnAppliedTime = std::chrono::steady_clock::now();
if (mTransactionStart == Scheduler::TransactionStart::Normal) return;
mTransactionStart = Scheduler::TransactionStart::Normal;
updateOffsets();
}
void VSyncModulator::onRefreshRateChangeInitiated() {
if (mRefreshRateChangePending) {
return;
}
mRefreshRateChangePending = true;
updateOffsets();
}
void VSyncModulator::onRefreshRateChangeCompleted() {
if (!mRefreshRateChangePending) {
return;
}
mRefreshRateChangePending = false;
updateOffsets();
}
void VSyncModulator::onRefreshed(bool usedRenderEngine) {
bool updateOffsetsNeeded = false;
// Apply a margin to account for potential data races
// This might make us stay in early offsets for one
// additional frame but it's better to be conservative here.
if ((mEarlyTxnStartTime.load() + MARGIN_FOR_TX_APPLY) < mTxnAppliedTime.load()) {
if (mRemainingEarlyFrameCount > 0) {
mRemainingEarlyFrameCount--;
updateOffsetsNeeded = true;
}
}
if (usedRenderEngine) {
mRemainingRenderEngineUsageCount = MIN_EARLY_GL_FRAME_COUNT_TRANSACTION;
updateOffsetsNeeded = true;
} else if (mRemainingRenderEngineUsageCount > 0) {
mRemainingRenderEngineUsageCount--;
updateOffsetsNeeded = true;
}
if (updateOffsetsNeeded) {
updateOffsets();
}
}
VSyncModulator::Offsets VSyncModulator::getOffsets() const {
std::lock_guard<std::mutex> lock(mMutex);
return mOffsets;
}
const VSyncModulator::Offsets& VSyncModulator::getNextOffsets() const {
// Early offsets are used if we're in the middle of a refresh rate
// change, or if we recently begin a transaction.
if (mExplicitEarlyWakeup || mTransactionStart == Scheduler::TransactionStart::EarlyEnd ||
mRemainingEarlyFrameCount > 0 || mRefreshRateChangePending) {
return mOffsetsConfig.early;
} else if (mRemainingRenderEngineUsageCount > 0) {
return mOffsetsConfig.earlyGl;
} else {
return mOffsetsConfig.late;
}
}
void VSyncModulator::updateOffsets() {
std::lock_guard<std::mutex> lock(mMutex);
updateOffsetsLocked();
}
void VSyncModulator::updateOffsetsLocked() {
const Offsets& offsets = getNextOffsets();
mPhaseOffsetControl.setPhaseOffset(mSfConnectionHandle, offsets.sf);
mPhaseOffsetControl.setPhaseOffset(mAppConnectionHandle, offsets.app);
mOffsets = offsets;
if (!mTraceDetailedInfo) {
return;
}
const bool isEarly = &offsets == &mOffsetsConfig.early;
const bool isEarlyGl = &offsets == &mOffsetsConfig.earlyGl;
const bool isLate = &offsets == &mOffsetsConfig.late;
ATRACE_INT("Vsync-EarlyOffsetsOn", isEarly);
ATRACE_INT("Vsync-EarlyGLOffsetsOn", isEarlyGl);
ATRACE_INT("Vsync-LateOffsetsOn", isLate);
}
} // namespace android::scheduler
// TODO(b/129481165): remove the #pragma below and fix conversion issues
#pragma clang diagnostic pop // ignored "-Wconversion"
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